XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.25.2

Schedule of Investments Classified by Contractual Maturity Date (Details) - USD ($) | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Marketable Securities [Line Items] |  |
Amortized cost | $ 393,340,165 | $ 376,012,071
Estimated fair value | 390,441,720 | 366,546,129
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 26,532,070 | 31,710,436
Estimated fair value | 22,895,915 | 27,579,511
Redeemable Preferred Stock [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 750,000 | 250,000
Estimated fair value | 754,800 | 250,000
Cemetery Perpectual Care Oblication [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 775,635 | 776,622
Estimated fair value | 770,339 |
Restricted Assets [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 2,457,363 | 2,356,862
Estimated fair value | 2,451,338 | $ 2,351,369
Due in 1 Year [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 13,289,170 |
Estimated fair value | 13,145,351 |
Due in 1 Year [Member] | Cemetery Perpectual Care Oblication [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 501,823 |
Estimated fair value | 500,139 |
Due in 1 Year [Member] | Restricted Assets [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 1,167,294 |
Estimated fair value | 1,165,242 |
Due in 2-5 Years [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 136,097,256 |
Estimated fair value | 136,429,699 |
Due in 2-5 Years [Member] | Cemetery Perpectual Care Oblication [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 221,939 |
Estimated fair value | 218,960 |
Due in 2-5 Years [Member] | Restricted Assets [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 941,785 |
Estimated fair value | 941,849 |
Due in 5-10 Years [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 131,592,054 |
Estimated fair value | 133,912,390 |
Due in 5-10 Years [Member] | Cemetery Perpectual Care Oblication [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 51,873 |
Estimated fair value | 51,240 |
Due in 5-10 Years [Member] | Restricted Assets [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 100,307 |
Estimated fair value | 100,283 |
Due in More than 10 Years [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 85,079,615 |
Estimated fair value | 83,303,565 |
Due in More than 10 Years [Member] | Cemetery Perpectual Care Oblication [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost |  |
Estimated fair value |  |
Due in More than 10 Years [Member] | Restricted Assets [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 247,977 |
Estimated fair value | $ 243,964 |

X
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_MarketableSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_RedeemablePreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=SNFCA_CemeteryPerpectualCareOblicationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=SNFCA_RestrictedAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=SNFCA_DueInOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=SNFCA_DueInTwoToFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=SNFCA_DueInFiveToTenYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseContractualTermAxis=SNFCA_DueInMoreThanTenYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |